Alfred langton



Patented Ian. 3|, I899.

A'. LANGTON.

WATER TUBE STEAM GENERATOR.

(Application fiiad'Jul 6, 1898.)

"lo Model.)

. n4: norms PETERS (11., wncrrouwa, WASHINGTON 04 c.

NE'TCE 'rA'rns 'ATENT Genres,

ALFRED LANGTON, OF LONDON, ENGLAND,

WATER TU BE STEAM-=G ENERATOR.

SPECIFICATION forming part of Letters Patent No. 618,693, dated January 31, 1899.

Application filed July 6, 1898.

Kent,England,have invented certain new and useful Improvements in lVater Tube Steam- Generators, (for which I have made an application for a patent in Great Britain, dated June 10, 1898, N0.13,031,) of which the following is a specification.

My invention relates to the construction of water-tube steam-generators of the kind described in the specification to Niclausses En glish Patent No. 1,052 of 1891, in which a water chamber or collector divided by a longitudinal partition into two compartments has projecting from it outer steam-generating tubes communicating at one end with the one compartment of the collector and closed at the other end, within which tubes were inner feed-tubes communicating with the other compartment of the collector, so that the water was made to fiow from the latter through the inner tubes into the generating-tubes, from which the steam and water passed back into the first compartment, whence the generated steam was led into a steam-chamber.

In the arrangementdescribed in Niclausses specification, No. 1,052 of 1891, the part of the outer tube which was fixed in the collector was formed separate from the other part and was constructed of malleable cast-iron with lateral openings for the entrance of the water and escape of steam, such casting, which is called the lantern, extending transversely through both compartments of the collector, the generating-tubes being screwed into the one end thereof, while the other end was closed by a screw-cap, which also supported the inner water-tube. This construction suffered from the disadvantages, first, that the necessarily very fine screw-threads of the joint between the tube and the lantern were liable to give way under the longitudinal strain to which they were subjected when withdrawing the tubes, and, secondly, that the comparatively weak parts of the malleable cast-iron lantern between the lateral open-- ings were liable to fracture. According to my present invention I obviate the above defects and at the same time simplify the con- Serial No. 685,274. (No model.)

struction by entirely dispensing with the said malleable cast-iron lantern and in lieu thereof extending the generating-tube right through the two compartments of the collector and providing lateral openings in both compartments, respectively, for the entrance of water into the inner tube and for the escape of steam and water from the generating-tube.

My said-improved construction of the gencrating-tubes is shown on the accompanying drawings, in which Figure 1 shows a part horizontal longitudinal section through one of the generatingtubes. Fig. 2 shows an elevation of the front end of the generating-tube and vertical section of part of the collector. Fig. 3 shows an end view of the same. Fig. 4B shows a crosssection at X X, Fig. 1. Fig. 5 shows a modified arrangement of the cap fixed on the front end of the tube.

The steam-generating tube A instead of stopping short at the inner wall 13 of the collector B and being there screwed into the malleable cast-iron lantern, as in Niclausses patent, is extended right through the collec-- tor B and has a coned collar formed on it at A by staying, by means of which it is fixed in the hole of the plate 13. It passes loose through a hole in the partition B of the collector and has screwed on its front end a cap 0 with coned shoulder at C, by which it is fixed in the hole of the front plate 13 This cap has an external hexagonal surface for enabling it to be screwed onto the tube A,

and into it is screwed the plug D, that carries the inner tube D in the same manner as described in Niclausses patent.

In the upper and lower sides of the tube A are cut openings at A and A ,which serve, rcspectively, to give entrance to the feed-water into the inner tube D from the chamber B of the collector and to allow the steam and water to pass from the generatingtube A into the chamber of the collector. A ring E is fixed inside the tube A at the mouth of the tube D, so as to close the annular space between this and the tube A, and thus insure the circulation of the water and steam in the above-described manner;

The inner end of the tube A is closed by a screwed plug F, as in Niclausses construction,

and the steam-generator is also otherwise the same as that construction and need therefore not be further described.

In the modification shown at Fig. 5 the cap 0 is screwed into the interior of the mouth of A instead of on the exterior thereof.

Having thus described the nature of this invention and the best means I know of earrying the same into practical effect, I claim- 1. In a water-tube steamgenerator,the combination with a steam-collecting chamber divided into two compartments, of a steam-generating tube communicating with one compartment and provided with a conical enlargement to fit a conical opening in the inner wall of the collecting-chamber, an inner tube passing through the generating-tube and communicatin g with the other compartment, said steam-generating tube having a part formed integral therewith which passes through the collector and is there provided with two sets of lateral holes, the one set serving for the entrance of feed-water into the inner tube and the other set serving for the escape of steam from the generating-tube, and a cap screwed upon the front end of the said latternamed tube and having a coned shoulder fitting into a correspondingly-coned hole in the outer wall of the collector, the parts being combined, substantially as described.

2. In a water-tube steam-generator,the combination with a steam-eollccting chamber divided into two compartments, of a steam-generating tube communicating with one of said compartments and having a threaded outer end, an inner tube passing through the generating-tube and communicating with the other compartment, said generating-tube being provided with two sets of lateral openings, the one set serving for the entrance of feed-water into the inner tube and the other set serving for the escape of steam from the generating-tube, and a cap screwed upon the ends of the generating-tube and inner tube respectively and provided with a coned shoulder which fits into a correspondingly-coned hole in the outer wall of the collector whereby the said tubes are firmly supported in position.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

ALFRED LANG .ON.

\Vitnesses:

OLIVER IMRAY, G. LAYTON SMITH. 

